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V. carneolata, 

 ' Guinaica, 

 ' laevigata, 

 ' polyzonalis, 



' fulva, 

 ' sulcata, 



V. nodulosa, 

 ' magnifica, 

 ' ancilla, 

 ' Magellanica, 

 ' Pacifica, 



V. fulminata, 

 ' Junonia, 

 ' un (In lata, 

 ' lapponica, 

 ' vexillum, 



V. volvacea, 



' festiva, 



1 mitragformis, 



' nucleus, 

 18 fossil species. 



Shell ovate oblong, 



Marginella 



nally thickened; base of the aperture 

 umella nearly equal. 



M, 



smooth, spire short, right lip exter- 

 scarcely notched; plaits on the col- 



M. glabella, 

 radiata, 

 nubeculata, 

 ccerulescens, 

 quinqueplicata, 

 limbata, 

 rosea, 



bifasciata, 



faba, 



aurantia, 



bivaricosa, 



longivaricosa, 



muscaria, 



formicula, 



M. 



eburnea, 



dentifera, 



dactylus, 



bullata, 



cornea, 



abellana, 



goodalli, 



M. persicula, 

 ' iineata, 

 ' tessellata, 

 ' interrupata, 

 ' marginata, 



1 fossil species. 



Volvaria. Shell cylindrical, convolute; spire scarcely projecting; aper- 

 ture narrow, the length of the shell. One or more folds on the lower part of 

 the columella. 



V. monilis, 

 ' pallida, 



V. triticea, 

 ' oryza, 



V. miliacea, 



1 fossil species. 



CONVOLUTA.— Six Genera. 



Shell without a canal, but having the base of the aperture channelled or ef- 

 fuse; the whorls large, compressed, convolute, the last nearly covering the 

 whole of the others. 



Ovula. Shell turgid, attenuated at each end, the margins turned upwards; 

 aperture longitudinal, narrow, effuse at the extremities; without teeth on the 

 left r, n 



left lip. 



O. ovum, 



' margarita, 



' Adriaticum, 



' pyriforme, 



' carneum, 



' marginatum, 



' lacteum, 



' breve, 



O. verrucosum, 

 ' angulosum, 

 ' triticeum, 

 ' frumentum, 

 ' stritulum, 

 ' emarginatum, 

 ' gibbosum, 

 ' obtusum, 



O. seminulum, 



' formicarium, 



' secale, 



' spelta, 



' intermedium, 



' birostre, 



' longirostratum, 



' volva, 



O. aciculare, 



' patulum, 



' hordeaceum, 



' rufurn, 



' avena, 



' inflexum, 



' a3quale, 

 2 fossil species. 



Cyprjea. Shell oval or ovate oblong, convex; the lips curved inwards; 



